22220122212 has 36 divisors (see below), whose sum is σ = 56193113340. Its totient is φ = 7403333952.

The previous prime is 22220122207. The next prime is 22220122229. The reversal of 22220122212 is 21222102222.

It can be written as a sum of positive squares in 2 ways, for example, as 18445985856 + 3774136356 = 135816^2 + 61434^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×22220122212³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59787 + ... + 219122.

It is an arithmetic number, because the mean of its divisors is an integer number (1560919815).

Almost surely, 2^22220122212 is an apocalyptic number.

It is an amenable number.

22220122212 is an abundant number, since it is smaller than the sum of its proper divisors (33972991128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22220122212 is a wasteful number, since it uses less digits than its factorization.

22220122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281132 (or 281127 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22220122212 its reverse (21222102222), we get a palindrome (43442224434).

The spelling of 22220122212 in words is "twenty-two billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twelve".